package c6.e14;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;

public class e14 {
    public static void main(String[] args){
        HashMap map=new HashMap();
        map.put("刘雯","杨思琪");
        map.put("1.","张三");
        map.put("2.","李四");
        map.put("3.","王五");
       System.out.println(map);
       //使用迭代器 取出所有数据
        Set keySet=map.keySet();
        Iterator it=keySet.iterator();
        while (it.hasNext()){
            Object key=it.next();
            System.out.println(key+":"+map.get(key));
        }

    }
}
